package com.tanhua.sso.service;

import com.alibaba.druid.util.StringUtils;
import com.alibaba.dubbo.config.annotation.Reference;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.tanhua.common.mapper.UserMapper;
import com.tanhua.common.pojo.User;
import com.tanhua.dubbo.server.api.HuanXinApi;
import io.jsonwebtoken.ExpiredJwtException;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.rocketmq.spring.core.RocketMQTemplate;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.messaging.MessagingException;
import org.springframework.stereotype.Service;
import sun.misc.Version;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Service
@Slf4j
public class UserService {

    @Autowired
    private RedisTemplate<String,String> redisTemplate;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private RocketMQTemplate rocketMQTemplate;

    @Value("${jwt.secret}")
    private String secret;

    @Reference(version = "1.0.0")
    private HuanXinApi huanXinApi;

    public String login(String phone, String code) {
        //创建boolean判断用户是否是新建用户
        boolean isNew = false;

        String redisKey = "CHECK_CODE_"+phone;

        String redisData = this.redisTemplate.opsForValue().get(redisKey);
        if (!StringUtils.equalsIgnoreCase(redisData,code)){
            return null; //表示验证失败
        }

//        验证成功后将验证码进行删除
        redisTemplate.delete(redisKey);

//        判断用户是否为新用户
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("mobile",phone);
        User user = this.userMapper.selectOne(queryWrapper);

        if (user == null){
            user = new User();
            user.setMobile(phone);
            user.setPassword(DigestUtils.md5Hex("123456"));

            this.userMapper.insert(user);
            isNew = true;

            Boolean register = this.huanXinApi.register(user.getId());
            if (!register){
                log.error("注册到环信平台失败！"+user.getId());
            }
        }

        Map<String, Object> claims = new HashMap<String, Object>();
        claims.put("id", user.getId());

        // 生成token
        String token = Jwts.builder()
                .setClaims(claims) //payload，存放数据的位置，不能放置敏感数据，如：密码等
                .signWith(SignatureAlgorithm.HS256, secret) //设置加密方法和加密盐
                .setExpiration(new DateTime().plusHours(12).toDate()) //设置过期时间，3秒后过期
                .compact();

        try {
            HashMap<String,Object> msg = new HashMap<>();
            msg.put("id",user.getId());
            msg.put("date",System.currentTimeMillis());
            this.rocketMQTemplate.convertAndSend("tanhua-sso-login",msg);
        } catch (MessagingException e) {
            log.error("发送消息失败",e);
        }
        return token +"|" + isNew;
    }

    public User queryUserByToken(String token) {
        try {
            // 通过token解析数据
            Map<String, Object> body = Jwts.parser()
                    .setSigningKey(secret)
                    .parseClaimsJws(token)
                    .getBody();

            User user = new User();
            user.setId(Long.valueOf(body.get("id").toString()));
            //需要返回user对象中的mobile，需要查询数据库获取到mobile数据
            //如果每次都查询数据库，必然会导致性能问题，需要对用户的手机号进行缓存操作
            //数据缓存时，需要设置过期时间，过期时间要与token的时间一致
            //如果用户修改了手机号，需要同步修改redis中的数据

            String redisKey = "TANHUA_USER_MOBILE_"+user.getId();
                if (this.redisTemplate.hasKey(redisKey)){
                    String mobile = this.redisTemplate.opsForValue().get(redisKey);
                    user.setMobile(mobile);
                }else{
                    User u = this.userMapper.selectById(user.getId());
                    user.setMobile(u.getMobile());

                    //将手机号写入到redis中
                    //在jwt中的过期时间的单位为：秒
                    long timeout = Long.valueOf(body.get("exp").toString()) * 1000 - System.currentTimeMillis();
                    this.redisTemplate.opsForValue().set(redisKey,u.getMobile(),timeout, TimeUnit.MILLISECONDS);
                }
                return user;
        } catch (ExpiredJwtException e) {
            log.info("token已经过期！ token = " + token);
        } catch (Exception e) {
            log.error("token不合法！ token = "+ token, e);
        }
        return null;
    }
}
